Spin transport across the interface in ferromagnetic/nonmagnetic systems

Swindells, C; Hindmarch, A.T.; Gallant, A.J.; Atkinson, D.

Abstract

Understanding interfacial spin transport is key to developing magnetoelectonic devices, however, the exact nature of the parameters involved is unclear. Here, we report a detailed ferromagnetic resonance-based spintransport analysis on a variety of structures of both ferromagnetic (Co, CoFeB) and heavy metal layers (Pt, Ru) in order to fully quantify the interfacial spin-transport parameters. Enhanced spin-mixing conductance is observed for more closely matched ferromagnet and heavy metal crystal structures, and, significantly, the inclusion of a thickness-dependent spin-diffusion length gives a bulk value of 9.4 ± 0.7 nm for Pt, resolving reported discrepancies.

Citation

Swindells, C., Hindmarch, A., Gallant, A., & Atkinson, D. (2019). Spin transport across the interface in ferromagnetic/nonmagnetic systems. Physical Review B, 99(6), Article 064406. https://doi.org/10.1103/physrevb.99.064406

• Journal Article Type: Article
• Acceptance Date: Jan 24, 2019
• Online Publication Date: Feb 5, 2019
• Publication Date: Feb 5, 2019
• Deposit Date: Jan 25, 2019
• Publicly Available Date: Feb 6, 2019
• Journal: Physical Review B
• Print ISSN: 2469-9950
• Electronic ISSN: 2469-9969
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 99
• Issue: 6
• Article Number: 064406
• DOI: https://doi.org/10.1103/physrevb.99.064406
• Public URL: https://durham-repository.worktribe.com/output/1309369